Description

UCCX817 /18 series provides all functions required for the pre -adjusted sectional regulator with active power factor. The controller plastic surgery by the current waveform of the AC input cable, which corresponds to the voltage waveform of the AC input cable, thereby achieving the purpose of approaching the power factor of the unit. The average current mode control remains stable and low -deformed real string current.

UCC2817/UCC2818 adopts the BICMOS process design of Texas instruments, which has low startup current, low power consumption, overvoltage protection, sub -road UVLO detection circuit, cutting -edge modulation technology and improvement of large -capacity capacitor ripple current. Design, low offset (± 2 MV) current exile to reduce distortion under light load conditions. Block figure

Instructions (continued)

UCC2817 provides a parallel adjuster with low startup current, which is suitable for applications using self -raising power supply. Essence UCC2818 is suitable for fixed power supply (VCC) applications.

Provide 16 stitches D, DW, N and PW packaging.

The absolute maximum rated value of the free air temperature (unless another instructions) of the power supply voltage VCC. 18 V power current ICC. 20mmonmen polar drive current, continuous. 0.2 Ann

Gallery driver current. 1.2 A input voltage, CAI, MOUT, SS. 8 v input voltage, pklmt. 5 v input voltage, vsense, OVP/EN. 10 V input current, RT, IAC, PKLMT. 10 mAh input current, VCC (no switch). 20 mia's maximum negative voltage, Drvout, PKLMT, MOUT. -0.5 V power consumption. 1W knot temperature, T. -55 ° C to 150 ° CJ type

Storage temperature T. -65 ° C to 150 ° CSTG

Lead temperature, T (welding, 10 seconds). 300 degrees Celsius solienal power consumption. The stress other than the stress listed below the absolute maximum rated value " may cause permanent damage to the device. These are only stress rated values and do not mean that the function operations of the device under these or any other conditions exceed the instructions of the recommended operation conditions. Long -term exposure to absolute maximum rated conditions may affect the reliability of the device.

UCC3817 is a BICMOS average current mode boost controller for high -power factor and high -efficiency pre -adjustment pressure supply. Figure 1 shows the UCC3817 in the 250-W power factor correction circuit. The input current of the offline switching power converter is often not sine. The input current waveform has a high harmonic content